APA Style

Brown, H. Douglas, Eqbal Ahmed. (). Principles of language learning and teaching . : .

Chicago Style

Brown, H. Douglas, Eqbal Ahmed. Principles of language learning and teaching. : , . .

MLA Style

Brown, H. Douglas, Eqbal Ahmed. Principles of language learning and teaching. : , . .

Turabian Style

Brown, H. Douglas, Eqbal Ahmed. Principles of language learning and teaching. : , . .